CN115621631B - End cover assembly, battery cell, energy storage device and electric equipment - Google Patents
End cover assembly, battery cell, energy storage device and electric equipment Download PDFInfo
- Publication number
- CN115621631B CN115621631B CN202211337206.4A CN202211337206A CN115621631B CN 115621631 B CN115621631 B CN 115621631B CN 202211337206 A CN202211337206 A CN 202211337206A CN 115621631 B CN115621631 B CN 115621631B
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- China
- Prior art keywords
- assembly
- column section
- injection hole
- liquid injection
- cover plate
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- 238000004146 energy storage Methods 0.000 title claims abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 78
- 238000002347 injection Methods 0.000 claims abstract description 74
- 239000007924 injection Substances 0.000 claims abstract description 74
- 238000007789 sealing Methods 0.000 claims abstract description 45
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 3
- 239000000178 monomer Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 21
- 239000003792 electrolyte Substances 0.000 description 17
- 238000003466 welding Methods 0.000 description 17
- 238000001556 precipitation Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/147—Lids or covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/172—Arrangements of electric connectors penetrating the casing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
- H01M50/609—Arrangements or processes for filling with liquid, e.g. electrolytes
- H01M50/627—Filling ports
- H01M50/636—Closing or sealing filling ports, e.g. using lids
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Filling, Topping-Up Batteries (AREA)
Abstract
The application discloses an end cover assembly, a battery monomer, an energy storage device and electric equipment, wherein the end cover assembly comprises: a cover plate and a terminal assembly. The cover plate is provided with a liquid injection hole, the terminal assembly is welded on the cover plate and covers the liquid injection hole to form a seal. According to the end cover assembly, the terminal assembly is used for sealing the liquid injection hole, so that the cost of additionally adopting the sealing nail for sealing the liquid injection hole is saved, meanwhile, the assembly of the terminal assembly on the cover plate and the sealing of the liquid injection hole are completed in one step, the assembly of the battery monomer is further simplified, and the assembly rate of the battery monomer can be improved.
Description
Technical Field
The application relates to the technical field of batteries, in particular to an end cover assembly, a battery monomer, an energy storage device and electric equipment.
Background
In the assembly process of the battery cell, the terminal assembly is assembled on the cover plate to form an electrode, electrolyte is required to be injected into the battery cell through the electrolyte injection hole after the cover plate is assembled on the battery cell, and after the electrolyte injection is completed, the electrolyte injection hole is required to be sealed by adopting a sealing nail. In the above-described assembling process, the terminal assemblies and the seal nails are required to be assembled on the cap plate, respectively, and the assembling efficiency of the end cap assembly is limited due to the assembling of the plurality of structures.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides the end cover assembly, which can reduce the assembly cost and improve the assembly efficiency.
The application also provides a battery cell with the end cover assembly.
The application also provides an energy storage device with the battery monomer.
The application further provides electric equipment with the energy storage device.
An end cap assembly according to an embodiment of the present application includes: the cover plate is provided with a liquid injection hole; the terminal assembly is welded and connected to the cover plate, and the terminal assembly covers the liquid injection hole.
According to the end cover assembly provided by the embodiment of the application, the cost of additionally adopting the sealing nails to seal the liquid injection hole is saved by adopting the terminal assembly to seal the liquid injection hole. Meanwhile, the assembly of the terminal assembly on the cover plate and the sealing of the liquid injection hole are completed in one step, so that the assembly of the battery monomer is simplified, and the assembly rate of the battery monomer can be improved.
In some embodiments, the cover plate is provided with an outer side surface and an inner side surface which are opposite in the thickness direction, a first sinking groove is arranged on the outer side surface, and the liquid injection hole is positioned at the bottom of the first sinking groove; the terminal assembly includes a first post segment at least partially positioned within the first sink. Therefore, the setting position of the terminal assembly on the liquid injection hole can be positioned, and the sealing effect of the terminal assembly on the liquid injection hole is improved.
Further, the periphery of the first column section is provided with a ring table, the ring table is in contact with the peripheral surface of the first sinking groove, and the ring table is in welded connection with the inner wall of the first sinking groove. Therefore, the gap between the sealing ring table and the first sinking groove can be sealed, and the sealing effect of the terminal assembly on the liquid injection hole is guaranteed.
Further, the terminal assembly includes a second post segment positioned within the pour hole. The second column section can form sealedly annotating liquid hole department, improves the sealed effect of terminal assembly to annotating liquid hole.
Specifically, the end cap assembly further comprises: the sealing ring is sleeved on the second column section, and the sealing ring is in interference fit with the liquid injection hole. Therefore, the sealing effect of the second column section on the liquid injection hole can be improved.
In some embodiments, the bottom surface of the first sink groove is further provided with a second sink groove, and the liquid injection hole is positioned on the bottom surface of the second sink groove. Thereby, the second precipitation tank can accommodate the remaining electrolyte.
Further, the terminal assembly further comprises a third column section, the third column section is located between the first column section and the second column section, and the third column section is located in the second sinking groove, so that the positioning effect on the welding position of the terminal assembly can be further improved.
Specifically, the diameter of the second sinking groove gradually decreases in the direction towards the liquid injection hole, the peripheral surface of the third column section is in contact connection with the peripheral surface of the second sinking groove, the liquid injection hole is sealed, and the sealing effect of the terminal assembly on the liquid injection hole is further improved.
In some embodiments, a side of the cover plate facing away from the terminal assembly is provided with a switching piece, and the switching piece is electrically connected with the terminal assembly. The terminal assembly is connected with the battery cell electrode lug through the switching piece, so that the connection area between the switching piece and the battery cell electrode lug is larger, the conduction stability of current is ensured, and the current output of the battery cell is more stable.
Further, a circular area welded with the cover plate is formed in the switching piece, and the projection of the liquid injection hole on the switching piece along the thickness direction of the cover plate is located in the circular area. Thereby, the welding area between the switching piece and the cover plate surrounds the opening of the liquid injection hole, and the gap between the switching piece and the cover plate can be reduced while the switching piece is fixed to the cover plate, so that electrolyte flowing between the switching piece and the cover plate is reduced or avoided
According to an embodiment of the present application, a battery cell includes: a housing having an opening; an electrode assembly accommodated in the case; and an end cap assembly as in any one of the above embodiments, the end cap assembly covering the opening.
According to the battery cell provided by the embodiment of the application, the end cover assembly of any one of the embodiments is adopted, so that the assembly cost of the battery cell can be reduced, and meanwhile, the assembly efficiency of the battery cell can be improved.
The energy storage device according to the embodiment of the application comprises the battery cell described in the above embodiment.
According to the energy storage device provided by the embodiment of the application, the assembly cost of the energy storage device can be reduced, and the assembly efficiency of the battery monomer and the energy storage device can be improved.
The electric equipment comprises the energy storage device.
According to the electric equipment provided by the embodiment of the application, the assembly cost of the electric equipment can be reduced, and the assembly efficiency of the electric equipment is improved.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the application will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is an exploded view of an end cap assembly according to a first embodiment of the present application;
FIG. 2 is a perspective view of the end cap assembly of the embodiment of FIG. 1;
FIG. 3 is a cross-sectional view of the end cap assembly of the embodiment of FIG. 1;
FIG. 4 is an enlarged schematic view of the liquid injection hole in FIG. 3;
FIG. 5 is a bottom view of the end cap assembly of the embodiment of FIG. 1;
FIG. 6 is an enlarged schematic view of the structure of the end cap assembly at the liquid injection hole according to the second embodiment of the present application;
FIG. 7 is an enlarged schematic view of the structure of the end cap assembly at the liquid injection hole according to the third embodiment of the present application;
FIG. 8 is an enlarged schematic view of the structure of a liquid injection hole of an end cap assembly according to a fourth embodiment of the present application;
FIG. 9 is an enlarged schematic view of the structure of the end cap assembly at the liquid injection hole according to the fifth embodiment of the present application;
fig. 10 is a bottom view of the end cap assembly of the embodiment of fig. 9.
Reference numerals:
end cap assembly 100,
An outer side S1, an inner side S2,
A welding area L1,
Cover plate 11, liquid injection hole 110, first sinking groove 111, second sinking groove 112, boss 113, groove 114,
Terminal assembly 12, ring 120, first post segment 121, second post segment 122, third post segment 123,
A sealing ring 13,
The tab 14, the perforation 141.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be understood that the terms "center," "length," "thickness," "upper," "lower," "bottom," "inner," "outer," "axial," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.
An end cap assembly 100, a battery cell, an energy storage device, and a powered device according to an embodiment of the present application are described below with reference to the accompanying drawings.
As shown in fig. 1-3, an end cap assembly 100 according to an embodiment of the present application includes: a cover plate 11 and a terminal assembly 12. The cover plate 11 is provided with a liquid injection hole 110, the terminal assembly 12 is welded on the cover plate 11, and the terminal assembly 12 covers the liquid injection hole 110 to form a seal with the liquid injection hole 110.
The terminal assembly 12 forms an electrode on the cap plate 11, and the cap plate 11 can form an electrical connection between the terminal assembly 12 and the cell tab inside the battery cell. And after the cap plate 11 is assembled to the battery cell, an electrolyte is injected into the battery cell through the electrolyte injection hole 110.
The end cap assembly 100 of the present application eliminates the cost of sealing the pour hole 110 with additional sealing nails by sealing the pour hole 110 with the terminal assembly 12. Meanwhile, the assembly of the terminal assembly 12 on the cap plate 11 and the sealing of the liquid injection hole 110 are completed in one step, thereby simplifying the assembly of the battery cell and improving the assembly rate of the battery cell.
In the present application, the assembly sequence of the end cap assembly 100 is as follows: first, the cap plate 11 is assembled to the battery cell, and then the battery cell is filled with a liquid through the liquid filling hole 110 of the cap plate 11, and after the filling is completed, the terminal assembly 12 is covered with the liquid filling hole 110 and sealed.
In some embodiments, as shown in fig. 3 and 4, the cover plate 11 has an outer side surface S1 and an inner side surface S2 opposite to each other in a thickness direction, the outer side surface S1 is provided with a first sink 111, and the filling hole 110 is located at the bottom of the first sink 111. The terminal assembly 12 includes a first post segment 121, the first post segment 121 being at least partially disposed within the first sink 111.
Thus, when the first column section 121 is located in the first sink 111, the first column section 121 can cover the liquid injection hole 110 located at the bottom of the first sink 111, so as to seal the liquid injection hole 110. The first post segment 121 and the first countersink 111 are matched to position the welding position of the terminal assembly 12 on the liquid injection hole 110, which is beneficial to improving the covering and sealing effect of the terminal assembly 12 on the liquid injection hole 110.
In the present application, the shapes of the first column section 121 and the first sink 111 are not limited. For example, the first column section 121 may be provided as a square column, and the first sink 111 is correspondingly provided as a square groove.
Further, a ring stand 120 is provided on the outer periphery of the first column section 121, the ring stand 120 is in contact with the peripheral surface of the first sink 111, and the ring stand 120 is welded to the inner wall of the first sink 111. With this structure, the sliding of the terminal assembly 12 along the outer side surface S1 of the cap plate 11 can be prevented or reduced, and the positioning effect of the first sink 111 on the welding position of the terminal assembly 12 can be improved. The annular platform 120 is welded to the inner wall of the first countersink 111, so that the welding stress is released along the terminal assembly 12 toward the outer side surface S1 of the cover plate 11 while the welding area is ensured to be large, and the welding effect of the terminal assembly 12 on the cover plate 11 is ensured.
Further, as shown in fig. 4, the terminal assembly 12 includes a second post segment 122, the second post segment 122 being positioned within the pour spout 110. With such a structure, the second column section 122 can also seal the liquid injection hole 110 while the first column section 121 and the first sink 111 are sealed in cooperation, so that the sealing effect on the liquid injection hole 110 is improved by the two-position sealing structure.
Specifically, the end cap assembly 100 further includes: the sealing ring 13, sealing ring 13 cover is on second column section 122, interference fit between sealing ring 13 and the notes liquid hole 110. Thereby, the sealing ring 13 can reduce the gap between the second column section 122 and the inner wall of the liquid injection hole 110, so as to improve the sealing effect of the second column section 122 on the liquid injection hole 110 and improve the sealing effect of the whole terminal assembly 12 on the liquid injection hole 110.
In the present application, the manner of fixing the gasket 13 to the second column section 122 is not limited. For example, the sealing ring 13 may be fixed to the second column section 122 by gluing; for another example, the sealing ring 13 may be fixed by providing an annular receiving groove in the second column section 122, in which the sealing ring is provided.
In some embodiments, as shown in fig. 6 and 7, the bottom surface of the first sink 111 is further provided with a second sink 112, and the filling hole 110 is located on the bottom surface of the second sink 112.
It will be appreciated that after the injection through the injection hole 110, the electrolyte is easily remained in the first precipitation tank 111, and the residual electrolyte may reduce the welding effect of the first column section 121 in the first precipitation tank 111, resulting in a reduced sealing effect between the first column section 121 and the first precipitation tank 111.
Thus, after the second precipitation tank 112 is provided, a larger proportion of the electrolyte remains in the second precipitation tank 112 that is closer to the pouring hole 110 than in the first precipitation tank 111, and the second precipitation tank 112 can accommodate the remaining electrolyte, and the electrolyte in the first precipitation tank 111 can flow into the second precipitation tank 112, thereby further reducing the remaining amount of the electrolyte in the first precipitation tank 111. Thereby reducing or avoiding the electrolyte from affecting the welding effect of the first leg 121 within the first sink 111.
Further, as shown in fig. 7, the terminal assembly 12 further includes a third post segment 123, the third post segment 123 being located between the first post segment 121 and the second post segment 122, the third post segment 123 being located within the second sink 112. With this structure, the third pillar section 123 is fitted to the second recess 112, further improving the positioning effect of the welding position of the terminal assembly 12.
In the present application, the shape of the third column section 123 and the second sink 112 is not limited. For example, the third column segment 123 may be configured as a square column, and the second sink 112 may be correspondingly configured as a square groove.
Specifically, the diameter of the second sink 112 gradually decreases in the direction toward the pour hole 110, and the peripheral surface of the third column segment 123 is in contact with the peripheral surface of the second sink 112. Therefore, the gap between the third column section 123 and the inner wall of the second sinking groove 112 is smaller, and the first column section 121 and the first sinking groove 111 are matched and sealed, and simultaneously, the third column section 123 and the second sinking groove 112 are sealed, so that the sealing effect on the liquid injection hole 110 is improved through the two sealing structures.
While in the particular example shown in fig. 7, the terminal assembly 12 further includes a second post segment 122, and the second post segment 122 is positioned within the pour hole 110. At this time, the first column section 121 and the first sink 111 are sealed in a matching manner, the third column section 123 also forms a seal with the second sink 112, and the second column section 122 also forms a seal with the pouring orifice 110. And further, three sealing structures are formed, and the sealing effect on the liquid injection hole 110 is further improved.
In some embodiments, as shown in fig. 1-10, the cover plate 11 is provided with a switch tab 14 on a side facing away from the terminal assembly 12, the switch tab 14 being electrically connected to the terminal assembly 12.
It can be understood that the adapter piece 14 can contact with the battery cell tab inside the battery cell to form a conductive circuit, and the cover plate 11 can serve as an intermediate conductor, so as to sequentially form a conductive circuit along the battery cell tab, the adapter piece 14, and the cover plate 11 to the terminal assembly 12, thereby realizing the electrical connection between the battery cell tab and the terminal assembly 12.
Therefore, the terminal assembly 12 is connected with the battery cell tab through the switching piece 14, so that the connection area between the switching piece 14 and the battery cell tab is larger, the conduction stability of current is ensured, and the current output of the battery cell is more stable.
In this embodiment, the assembly sequence of the end cap assembly 100 is as follows: first, the switching piece 14 is attached to the inner side S2 of the cap plate 11, then the cap plate 11 is assembled to the battery cell, and then the battery cell is filled with a liquid through the liquid filling hole 110 in the cap plate 11, and after the filling is completed, the terminal assembly 12 is covered with the liquid filling hole 110 and welded and sealed.
Further, a portion of the switching piece 14 is disposed corresponding to the terminal assembly 12, and a perforation 141 facing the liquid injection hole 110 is disposed on the switching piece 14.
It will be appreciated that the adapter plate 14 is already attached to the cover plate 11 at the time of filling through the filling port 110, as can be seen with reference to the above-described end cap assembly sequence. And a portion of the switch piece 14 is disposed in correspondence with the terminal assembly 12, which causes the switch piece 14 to cover and block the pour hole 110.
Therefore, the through hole 141 opposite to the liquid injection hole 110 is disposed on the adapting piece 14, that is, the through hole 141 is coaxially disposed with the center of the liquid injection hole 110, so that the liquid injection hole 110 is communicated with the inside of the battery cell through the through hole 141, and the electrolyte can flow through the adapting piece 14 through the through hole 141, thereby reducing or avoiding the blockage of the adapting piece 14 to the liquid injection hole 110, and further ensuring the smoothness of liquid injection through the liquid injection hole 110.
In the present application, the shape of the hole 141 and the pouring hole 110 is not limited. For example, the perforations 141 and the pour spout 110 may each be configured as circles. For another example, the perforations 141 may be square and the injection holes 110 may be circular. In addition, the perforations 141 on the transfer sheet 14 may be provided in different sizes, and the perforations 141 may be provided larger than the pour hole 110, equal to the pour hole 110, or smaller than the pour hole 110.
Further, the adaptor piece 14 is provided with a circular area welded with the cover plate 11, and the projection of the liquid injection hole 110 on the adaptor piece 14 along the thickness direction of the cover plate 11 is located in the circular area. Thereby, the welding area L between the switching piece 14 and the cover plate 11 surrounds the opening of the pouring hole 110, and the gap between the switching piece 14 and the cover plate 11 can be reduced while fixing the switching piece 14 to the cover plate 11, reducing or avoiding the flow of electrolyte between the switching piece 14 and the cover plate 11.
Referring now to fig. 4-10, a portion of a specific embodiment of an end cap assembly 100 according to the present application is described. In the end cap assembly 100 of the first embodiment shown in fig. 4 and 5, the first sink 111 is provided on the outer side surface S1 of the cover plate 11, and the liquid injection hole 110 is located at the bottom surface of the first sink 111. Meanwhile, the terminal assembly 12 includes a first post segment 121, a ring table 120 is disposed on the first post segment 121, and a second post segment 122 is disposed at the bottom of the first post segment 121. In such a structure, the second column section 122 can also seal the liquid injection hole 110 while the ring 120 and the first sink 111 are welded and sealed, so that the sealing effect on the liquid injection hole 110 is improved by the two-position sealing structure.
In this embodiment, the groove 114 is disposed on the outer side surface S1 of the cover plate 11 around the first sink 111, and the groove 114 cooperates with the first column section 121 to accommodate the molten liquid formed in the welding process of the first column section 121, thereby releasing the welding stress and improving the reliability of the welding connection of the first column section 121 in the first sink 111.
Meanwhile, the boss 113 is arranged on the inner side surface S2 of the cover plate 11 around the liquid injection hole 110, the length of the liquid injection hole 110 in the axial direction can be increased by the boss 113, meanwhile, the thickness of the cover plate 11 at the first sinking groove 111 and the second sinking groove 112 is increased, the structural strength of the cover plate 11 at the first sinking groove 111, the second sinking groove 112 and the liquid injection hole 110 is further improved, and the structural reliability of the cover plate 11 is guaranteed.
In addition, the adapter piece 14 is welded to the boss 113, and the through hole 141 is the same as the filling hole 110 in size, and at this time, a welding area L1 between the adapter piece 14 and the boss 113 is provided around the through hole 141.
In the end cap assembly 100 of the second embodiment shown in fig. 6, the second column section 122 is not provided at the bottom of the first column section 121 on the basis of the first embodiment described above.
In the end cap assembly 100 of the third embodiment shown in fig. 7, the terminal assembly 12 further includes a third post segment 123 in addition to the end cap assembly 100 of the first embodiment described above. The third column section 123 is disposed in the second sink 112, the second column section 122 is disposed in the liquid injection hole 110, and the second column section 122 is sleeved with the sealing ring 13 and is in interference fit with the liquid injection hole 110.
With this structure, the first column section 121 and the annular land 120 are welded and sealed, and the third column section 123 is also sealed with the second sink 112, and the second column section 122 is also sealed with respect to the pouring orifice 110. And further, three sealing structures are formed, and the sealing effect on the liquid injection hole 110 is further improved.
Furthermore, on the inner side surface S2, the end surface of the second column section 122 is flush with the opening of the pouring orifice 110.
In the end cap assembly 100 of the fourth embodiment shown in fig. 8, the second post segment 122 extends out of the pour hole 110 and is partially within the perforation 141, based on the end cap assembly 100 of the third embodiment described above. With such a structure, the second column section 122 can also cooperate with the perforation 141 to form a seal, further improving the sealing effect on the liquid injection hole 110.
In the cap assembly 100 of the fifth embodiment shown in fig. 9 and 10, the perforations 141 are provided coaxially with the center of the pour hole 110 on the basis of the cap assembly 100 of the third embodiment described above, but the perforations 141 are provided in an area smaller than the area of the pour hole 110.
With this structure, the end face of the second column section 122 located on the inner side face S2 can be partially in contact with the switching piece 14. The adapter piece 14 can thus form a conductive circuit directly with the second leg 122, without the adapter piece 14 being connected to the terminal assembly 12 by means of a conductive structure on the cover plate 11.
In this embodiment, since the through hole 141 is smaller than the pouring hole 110, the welding area L1 between the adapter piece 14 and the boss 113 is disposed around the projection of the pouring hole 110 on the adapter piece 14.
A battery cell according to an embodiment of the present application includes a case, an electrode assembly, and the end cap assembly 100 of any of the above embodiments. Wherein the case has an opening, the electrode assembly is received in the case, and the cap assembly 100 covers the opening of the case.
The battery cell of the present application can reduce the assembly cost of the battery cell and improve the assembly efficiency of the battery cell by adopting the end cap assembly 100 of any one of the above embodiments.
The energy storage device according to the embodiment of the application comprises the battery cell of the embodiment.
The energy storage device can reduce the assembly cost of the energy storage device and improve the assembly efficiency of the battery monomer and the energy storage device.
The electric equipment comprises the energy storage device.
The electric equipment can reduce the assembly cost of the electric equipment and improve the assembly efficiency of the electric equipment.
Other configurations and operations of end cap assemblies 100, battery cells, energy storage devices, and powered devices according to embodiments of the present application are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present specification, a description referring to the terms "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the application, the scope of which is defined by the claims and their equivalents.
Claims (8)
1. An end cap assembly, comprising:
the device comprises a cover plate (11), wherein a liquid injection hole (110) is formed in the cover plate (11), the cover plate (11) is provided with an outer side surface (S1) and an inner side surface (S2) which are opposite in the thickness direction, a first sinking groove (111) is formed in the outer side surface (S1), a second sinking groove (112) is further formed in the bottom surface of the first sinking groove (111), and the liquid injection hole (110) is located on the bottom surface of the second sinking groove (112);
a terminal assembly (12), wherein the terminal assembly (12) is welded on the cover plate (11), and the terminal assembly (12) covers the liquid injection hole (110);
wherein the terminal assembly (12) comprises:
the first column section (121), the first column section (121) is located in the first sinking groove (111) at least partially, the periphery of the first column section (121) is provided with a ring table (120), the ring table (120) is in contact with the peripheral surface of the first sinking groove (111), and the ring table (120) is in welded connection with the inner wall of the first sinking groove (111);
a second column section (122), the second column section (122) being located within the liquid injection hole (110);
-a third column section (123), said third column section (123) being located between said first column section (121) and said second column section (122), said third column section (123) being located within said second sink (112).
2. The end cap assembly of claim 1, further comprising: the sealing ring (13), sealing ring (13) cover is in on the second column section (122), interference fit between sealing ring (13) and annotate liquid hole (110).
3. The end cap assembly according to claim 1, wherein the diameter of the second countersink (112) decreases gradually in a direction toward the liquid injection hole (110), and the peripheral surface of the third column section (123) is in contact connection with the peripheral surface of the second countersink (112).
4. An end cap assembly according to any one of claims 1-3, characterized in that the side of the cover plate (11) facing away from the terminal assembly (12) is provided with a switch tab (14), the switch tab (14) being electrically connected with the terminal assembly (12).
5. The end cap assembly according to claim 4, wherein the adapter piece (14) is provided with a circular area welded with the cover plate (11), and the projection of the liquid injection hole (110) on the adapter piece (14) along the thickness direction of the cover plate (11) is positioned in the circular area.
6. A battery cell, comprising:
a housing having an opening;
an electrode assembly accommodated in the case; and
the end cap assembly (100) of any of claims 1-5, the end cap assembly (100) covering the opening.
7. An energy storage device comprising the battery cell of claim 6.
8. A powered device comprising an energy storage device according to claim 7.
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| CN202211337206.4A CN115621631B (en) | 2022-10-28 | 2022-10-28 | End cover assembly, battery cell, energy storage device and electric equipment |
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| CN202211337206.4A CN115621631B (en) | 2022-10-28 | 2022-10-28 | End cover assembly, battery cell, energy storage device and electric equipment |
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| CN116014389B (en) | 2023-02-09 | 2023-06-30 | 深圳海润新能源科技有限公司 | Energy storage device and electric equipment |
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| CN115621631A (en) | 2023-01-17 |
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